Bolton boxer Khan was ringside in Las Vegas last weekend to see unbeaten Mayweather, 36, beat Robert Guerrero.

And he took to Twitter afterwards to talk up a clash with the WBC welterweight champ, who has now won 44 out of 44, including a demolition of Manchester’s Ricky Hatton in 2007.

Khan, 26, has unfinished business with Danny Garcia and Lamont Peterson, who inflicted two of the three defeats of his 31-fight career.

But his focus is on stepping up a division for a battle with legend Mayweather, regarded as the best pound-for-pound fighter in the world.

Khan tweeted: “Mayweather may not be around for long. I want my shot. The world’s talking about the fight. Garcia, Peterson will be around until I’m around for rematches.

“Zab Judah caused big problems with speed and movement against Floyd for 12 rounds but lasted five against me – styles make fights. Garcia and Peterson will be around much longer ...I will take rematches with both.”

Mayweather will fight five more times in a multi-million dollar deal with TV network Showtime.